Formula Tables For Calculating Plant Nutrient Values

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of nitrogen (N), phosphorus (P) and potassium (K) in willows commonly found in diets of Seward Peninsula reindeer. Salix pulchra (SAPU), Salix lanata (SALA) , Salix alexensis (SAAL), and Salix fusescence (SAFU). 

Species N(%) P(%) K(%)
SAPU      
JD 16.2-0.1(JD) + 1.6E-4(JD2) 3.5-2.6E-2(JD)+5.1E-5(JD2) 4.1-2.2E-2(JD)+3.0E-5(JD2)
n/R2/p 217/ 0.79/ <0.001 173/0.79 / <0.001 173/0.55/ <0.001
GDD 6.4-1.1E-2(GDD)+1.0E-5(GDD2)-3.5E-9(GDD3) .9-1.4E-3(GDD)+1.0E-6(GDD2) 1.7-1.1E-3(GDD)+1.7E-7(GDD2)
n/R2/p 209/ 0.91/ <0.001 165/0.75/ <0.001 166/ 0.66/ <0.001
PH 5.3+4.3E-2(PH)-4.2E-2(PH2) 1.2-1.1E-1(PH) 1.5+9.2E-2(PH)-1.7E-2(PH2)
n/R2/p 222/ 0.94/ <0.001 165/ 0.79/ <0.001 165/ 0.70/ < 0.001
SALA      
JD 14.7-8.9E-2(JD)+1.5E-4(JD2) 3.1-2.4E-2(JD)+4.7E-5(JD2) 3.1-9.8E-3(JD)
n/R2/p 64/ .75/ <.001 30/ .79/ <.001 30/ .69/ <.001
GDD 7.2-1.7E-2(GDD)+1.9E-5(GDD2)-7.5E-9(GDD3) .77-1.2E-3(GDD)+1E-6(GDD2) 1.8-9.6E-4(GDD)
n/R2/p 55/ .91/ <.001 29/ .92/ <.001 29/ .84/ <.001
PH -4.1+3.9(PH)-5.3E-1(PH2)+2.1E-2(PH3) 1.1-.1(PH) 2.8-.2(PH)
n/R2/p 64/ 0.76/ < 0.001 29/ 0.86/ < 0.001 29/ 0.70/ < 0.001
SAAL      
JD 16.4-.1(JD)+1.8E-4(JD2) 3.9-3.1E-2(JD)+6.3E-5(JD2) 6.1-3.9E-2(JD)+7.4E-5(JD2)
n/R2/p 63/ .70/ <.001 47/ .78/ <.001 47/ .69/ <.001
GDD 6.8-1.3E-2(GDD)+1.3E-5(GDD2)-4.3E-9(GDD3) 1.1-2.6E-3(GDD)+2E-6(GDD2)-7.4E-10(GDD3) 2.1 -1.8E-3(GDD)+1.0E-6(GDD2)
n/R2/p 52/ .87/ <.001 46/ .92/ <.001 46/ .80/ <.001
PH 5.5+6.8E-2(PH)-4.4E-2(PH2) 1.1-9.4E-2(PH)-5.8E-4(PH2) 1.8+8.9E-2(PH)-1.7E-2(PH2)
n/R2/p 61/ 0.83/ < 0.001 45/ 0.87/ < 0.001 45/ 0.76/ < 0.001
SAFU      
JD 23.99-0.18(JD)+3.6E-4(JD2) 24.54-0.33(JD)+1.5E-3(JD2)-2E-6(JD3) 2.74-9E-3(JD)
n/R2/p 29/ 0.81/ < 0.001 29/ 0.90/ < 0.001 29/ 0.90/ < 0.001
GDD 7-1.5E-2(GDD)+1.5E-5(GDD2)-5.05E-9(GDD3) .96-2.3E-3(GDD)+2E-5(GDD2)-7.2E-10(GDD3) 1.5-6.8E-4(GDD)
n/R2/p 29/ 0.94/ < 0.001 29/ .0.90/ < 0.001 29/ 0.92/ < 0.001
PH 5.98-0.4(PH)-7.5E-3(PH2) 0.76-6.2E-2(PH) 0.6+0.17(PH)-1.7E-3(PH2)
n/R2/p 29/ 0.88/ < 0.001 29/ 0.86 < 0.001 29/ 0.88/ < 0.001
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of neutral detergent fiber (NDF), acid detergent fiber (ADF) and in-vitro true dry matter digestibility (IVTDMD) in willows commonly found in diets of Seward Peninsula reindeer. Salix pulchra (SAPU), Salix lanata (SALA), Salix alexensis (SAAL), and Salix fusescence (SAFU). 

Species NDF(%) ADF(%) IVTDMD(%)
SAPU      
JD -29.2+0.39(JD)-6.4E-4(JD2) 15.4-8.1E-2(JD)+3.5E-4(JD2) 25.1+0.5(JD)-1.5E-3(JD2)
n/R2/p 226/ 0.45/ < 0.001 226/ 0.49/ < 0.001 162/ 0.37/ <0.001
GDD 12.04+2.3E-2(GDD)-7.0E-6(GDD2) 9.96+3.7E-3(GDD)+2.0E-6(GDD2) 6.13+0.03(GDD)-4.7E-5(GDD2)+1.6E-8(GDD3)
n/R2/p 211/ 0.59/< 0.001 210/ 0.63/ < 0.001 177/ 0.22/ < 0.001
PH 12.3-0.18(PH)+0.18(PH2) 13.54-1.59(PH)+0.18(PH2) 47.73+6.72(PH)-0.52(PH2)
n/R2/p 224/ 0.61/ < 0.001 223/ 0.61/ < 0.001 188/ 0.21/ < 0.001
SALA      
JD 4.0+0.09(JD) 65.79-0.57(JD)+1.5E-3(JD2) -31.25+1.1(JD)-2.6E-3(JD2)
n/R2/p 61/ 0.41/ < 0.001 62/ 0.63/ < 0.001 58/ 0.29/ < 0.001
GDD 17.2+8E-3(GDD) 15.3-1.2E-2(GDD)+1.1E-5(GDD2) 66.7+0.02(GDD)-1.7E-5(GDD2)
n/R2/p 53/ 0.50/ < 0.001 53/ 0.64/ < 0.001 58/ 0.27/ < 0.001
PH 68.2-13.76(PH)+0.96(PH2) 44.82-9.0(PH)+0.61(PH2) 48.52+8.2(PH)-0.57(PH2)
n/R2/p 60/ 0.66/ < 0.001 61/ 0.61/ < 0.001 54/ 0.21/ < 0.001
SAAL      
JD 65.98-.49(JD)+1.5E-3(JD2) 62.33-.48(JD)+1.3E-3(JD2) -36.17+1.14(JD)-3.1E-3(JD2)
n/R2/p 63/0 .70 / < 0.001 62/ 0.58/ < 0.001 60/ 0.68/ < 0.001
GDD 21.04+1.2E-2(GDD) 18.69-0.01(GDD)+9.0E-6(GDD2) 62.53+0.02(GDD)-2.0E-5(GDD2)
n/R2/p 50/ 0.60/ < 0.001 52/ 0.51/ < 0.001 50/ 0.58/ < 0.001
PH 54.96-10.33(PH)+0.83(PH2) 37.57-6.64(PH)+0.48(PH2) 26.18+12.98(PH)-0.96(PH2)
n/R2/p 58/ 0.59/ < 0.001 61/ 0.39/ < 0.001 53/ 0.32/ < 0.001
SAFU      
JD -139.55+1.44(JD)-2.9E-3(JD2) 30.79+0.36(JD)-5.9E-4(JD2) 97.65-4.3E-2(JD)-4.4E-4(JD2)
n/R2/p 24/ 0.81/ < 0.001 24/ 0.75/ < 0.001 24/ 0.76/ < 0.001
GDD 10.0+3.9E-2(GDD)-1.3E-5(GDD2) 9.8+1.3E-2(GDD)-3E-6(GDD2) 81.0-9.3E-3(GDD)-4.0E-6(GDD2)
n/R2/p 24/ 0.90/ < 0.001 24/ 0.76/ < 0.001 24/ 0.71/ < 0.001
PH 10.9+0.61(PH)+0.2(PH2) 13.5-1.26(PH)+0.2(PH2) 58.01+8.19(PH)-0.75(PH2)
n/R2/p 24/ 0.91/ < 0.001 24/ 0.76/ < 0.001 24/ 0.76/ < 0.001
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of nitrogen (N), phosphorus (P) and potassium (K) in sedges commonly found in diets of Seward Peninsula reindeer. (Carex aquatilis (CAAQ), Carex bigelowii (CABI), and Carex lyngbyaei (CALY). 

Species N(%) P(%) K(%)
CAAQ      
JD -2.6+5.6E-2(JD)+1.8E-4(JD2) -2.5+4.2E-2(JD)-2.2E-4(JD2)+3.4E-7(JD3) -17.8+2.9E-1(JD)-1.4E-3(JD2)+2E-6(JD3)
n/R2/p 126 / .59 / <.001 116 / .47 / <.001 119 / .57/ <.001
GDD 2.2+8.9E-4(GDD)-1E-6(GDD2) .23+1.2E-4(GDD)-4.3E-7(GDD2)+1.8E-10(GDD3) 1.1+2.3E-3(GDD)-4E-6(GDD2)+1.3E-9(GDD3)
n/R2/p 123 / .64 / <.001 114 / .58 /<.001 117 / .6/<.001
PH 2+2.1E-1(PH)-2.8E-2(PH2) .19+5.1E-2(PH)-1.2E-2(PH2)+5.8E-4(PH3) 1.2+1.6E-1(PH)-2.2E-2(PH2)
n/R2/p 126 /  0.60 / <.001 103 / .57 / <.001 105 / .62 / <.001
CABI      
JD -11.4+2.4E-1(JD)-1E-3(JD2)+2E-6(JD3) 1.1-7E-3(JD)+1.1E-5(JD2) -1.3+3.7E-2(JD)-1.2E-4(JD2)
n/R2/p 88 / .78 / <.001 76 / .79 / <.001 76 / .80 / <.001
GDD 3.6-1.9E-3(GDD) 3.8E-1-4.4E-4(GDD)+2E-7(GDD2) 1.6+3.7E-4(GDD)-9E-7(GDD2)
n/R2/p 88 / .86 / <.001 73 / .89 / <.001 73 / .76 / <.001
PH 3.2-1.2E-1(PH)-2.9E-2(PH2) 4.4E-1-3.5E-2(PH) 1.1+2.5E-1(PH)-2.7E-2(PH2)
n/R2/p 88 / .76 /<.001 60 / .85 / <.001 60 / .61 / <.001
CALY      
JD -6.9+.11(JD)-2.9E-4(JD2) -6.8+.11(JD)-5.6E-4(JD2) 4.8-1.2E-2(JD)-9E-6(JD2)
n/R2/p 41/ .44/ <.001 38/ .43/ <.001 38/ .39/ <.001
GD 2.2-3.1E-3(GDD)-3E-6(GDD2) .37-7.4E-5(GDD)-1.2E-7(GDD2) 3-1.4E-3(GDD)-1.1E-7(GDD2)
n/R2/p 39/ .47/ <.001 36/ .39/ <.001 36/ .42 <.001
PH 2.1+.46(PH)-5.6E-2(PH2) .31+2.7E-2(PH)-5E-3(PH2) 2.5+.11(PH)-2.6E-2(PH2)
n/R2/p 40/ .51 <.001 32/ .43/ <.001 32/ .42 <.001

 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of  neutral detergent fiber (NDF), acid detergent fiber (ADF) and in-vitro true dry matter digestibility (IVTDMD) in sedges commonly found in diets of Seward Peninsula reindeer. (Carex aquatilis (CAAQ), Carex bigelowii (CABI), and Carex lyngbyaei (CALY). 

Species NDF(%) ADF(%) IVTDMD(%)
CAAQ      
JD 106.7-.43(JD)+1E-3(JD2) 58.1-.32(JD)+8.1E-4(JD2) 24.9+0.48(JD)-1.5E-3(JD2)
n/R2/p 126 / 0.59 / <0.001 122/ 0.35/ <0.001 105/ 0.46/ <0.001
GDD 2.2+8.9E-4(GDD)-1E-6(GDD2) 28.8-9E-3(GDD)+7E-6(GDD2) 5.5+.045(GDD)-6.4E-5(GDD2)+.2E-8(GDD3)
n/R2/p 123 / 0.64 / <0.001 119/ .29/ <.001 106/ .49/ <.001
PH 2+2.1E-1(PH)-2.8E-2(PH2) 28.6-.97(PH)+8.2E-2(PH2) 56.4+3.4(PH)-.4(PH2)
n/R2/p 126 / .60 / <.001 122/ .14/ <.001 100/ .50/ <.001
CABI      
JD 129.4-6.9E-1 (JD)+1.7E-3(JD2) 1.11.1-7E-3(JD)+1.1E-5(JD2) -1.3+3.7E-2(JD)-1.2E-4(JD2)
n/R2/p 87 / .41 / <.001 76 / .79 / <.001 76 / .80 / <.001
GDD 65.3-1.9E-2 (GDD)+1.3E-5(GDD2) 3.8E-1-4.4E-4(GDD)+2E-7(GDD2) 1.6+3.7E-4(GDD)-9E-7(GDD2)
n/R2/p 87 / .44 / <.001 73 / .89 / <.001 73 / .76 / <.001
PH 70-2.9(PH)+1.9E-1(PH2) 4.4E-1-3.5E-2(PH) 1.1+2.5E-1(PH)-2.7E-2(PH2)
n/R2/p 86 / .17 / <.001 60 / .85 / <.001 60 / .61 / <.001
CALY      
JD 142.8-.86(JD)+2.1E-3(JD2) 75-.53(JD)+1.4E-3(JD2) -263.5+3.8(JD)-1E-2(JD2)
n/R2/p 41/ .30/ .001 41/ .39 / <.001 39/ .37/ <.001
GDD 66.8-3.3E-2(GDD)+2.6E-5(GDD2) 29.1-2E-2(GDD)+1.7E-5(GDD2) 59.4+7.4E-2(GDD)-7.7E-5(GDD2)
n/R2/p 39/ .34 /<.001 39/ .47/ <.001 37/ .31/ .002
PH 65-3.4(PH)+.35(PH2) 28.2-2.1(PH)+.23(PH2) 56.5+11.4(PH)-1.4(PH2)
n/R2/p 40/ .33/ <.001 40/ .40 / <,001 36/ .44/ <.001
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of nitrogen (N), phosphorus (P) and potassium (K) in leaves of graminoids; Calamagrostis canadensis (CACA), Eriophorum  angustifolium (ERAN) and inflorescences of Eriophorum vaginatum (ERVA) found in diets of Seward Peninsula reindeer.

Species N(%) P(%) K(%)
CACA      
JD 23.3-.18(JD)+3.8E-4(JD2) -11.3+.18(JD)-9E-4(JD2)+1E-6(JD3) -48.7+.8(JD)-4.1E-3(JD2)+7E-6(JD3)
n/R2/p 20/ .71/ <.001 36/ .51/ <.001 36/ .63/ <.001
GDD 5.2-8.1E-3(GDD)+5E-6(GDD2) .25-4.2E-4(GDD)-1E-6(GDD2)+5.4E-10(GDD3) 2.6-2.9E-3(GDD)+1E-6(GDD2)
n/R2/p 20/ .82/ <.001 36/ .62/ <.001 36/ .69/ <.001
PH 2.8+.24(PH)-4.2E-2(PH2) .23+6.5E-2(PH)-8.4E-3(PH2) 2.0+.05(PH)-2.5E-2(PH2)
n/R2/p 20/ .56/ <.001 15/ .57/ .007 15/ .49/ .016
ERAN      
JD -43.9+.72(JD)-3.6E-3(JD2)+6E-6(JD3) 1.36-9.9E-3(JD)+2.1E-5(JD2) 6.99-4.8E-2(JD)+9.2E-5(JD2)
n/R2/p 55/ .35/ <.001 52/ .30/ <.001 52/ .41/ <.001
GDD 2.1+3.7E-3(GDD)-8E-6(GDD2)+3.7E-9(GDD3) .42-4.7E-4(GDD)+2.4E-7(GDD2) 2.2-2.5E-3(GDD)+1E-6(GDD2)
n/R2/p 54/ .43/ <.001 51/ .53/ <.001 51/ .48/ <.001
PH 2.4+.11(PH)-1.9E-2(PH2) .35-.02(PH)+6.1E-4(PH2) 1.78-2.77E-2(PH)-7.4E-3(PH2)
n/R2/p 54/ .38/ <.001 41/ .38/ <.001 41/ .51/ <.001
ERVA      
JD 3.83-9.7E-3(JD) .57-1.9E-3(JD) 1.94-5.6E-3(JD)
n/R2/p 18/ .71/ <.001 27/ .62/ <.001 28/ .47/ <.001
GDD 2.6-9.2E-4(GDD) .31-1.7E-4(GDD) 1.26-64E-4(GDD)
n/R2/p 18/ .74/ <.001 24/ .58/ <.001 24/ .56/ <.001
PH 3.85-.35(RPH*) .67-8.6E-2(RPH) 2.5-.31(RPH)
n/R2/p 18/.50/<.001 18/ .67/ <.001 18/.70/ <.001

 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of  neutral detergent fiber (NDF), acid detergent fiber (ADF) and in-vitro true dry matter digestibility (IVTDMD) in leaves of graminoids; Calamagrostis canadensis (CACA), Eriophorum  angustifolium (ERAN) and inflorescences of Eriophorum vaginatum (ERVA) found in diets of Seward Peninsula reindeer. 

Species NDF(%) ADF(%) IVTDMD(%)
CACA      
JD 24.5+.18(JD) 8.5+9.4E-2(JD) 156.8-.43(JD)
n/R2/p 18/ .45/ .002 18/ .59/ <.001 17/ .71/ <.001
GDD 52.1+.16(GDD) 22.61+8.4E-3(GDD) 92.12-3.9E-2(GDD)
n/R2/p 17/ .50/ .001 18/ .59/ <.001 17/ .71 <.001
PH 56.15+.82(PH) 23.61-.56(PH) 87.3-2.5(PH)
n/R2/p 16/ .21/ .07 16/ .31/ .03 15/ .39/ .01
ERAN      
JD 100-.48(JD)+1.3E-3(JD2) 72.02-.53(JD)+1.4E-3(JD2) 17.86+.71(JD)-2.4E-3(JD2)
n/R2/p 50/ .24/ .001 53/ .37 <.001 53/ .39/ <.001
GDD 57.5-1.1E-2(GDD)+1.1E-5(GDD2) 24.7-1.3E-2(GDD)+1.2E-5(GDD2) 67.91+1.6E-2(GDD)-2.9E-5(GDD2)
n/R2/p 49/ .37/ <.001 52/ .37/ <.001 51/ .45/ <.001
PH 58.6-1.8(PH)+.18(PH2) 25.2-1.76(PH)+.17(PH2) 63.65+3.76(PH)-.48(PH2)
n/R2/p 50/ .20/ .006 53/ .27/ <.001 48/ .46/ <.001
ERVA      
JD 75.9-5.8E-2(JD) 10.7+7E-2(JD) -93.8+2.02(JD)-.6E-2(JD2)
n/R2/p 18/ .39/ .018 18/ .84/ <.001 18/ .33/ .06
GDD 68.1-5.2E-3(GDD) 19.97+6.6E-3(GDD) 77.8-.013(GDD)
n/R2/p 18/ .39/ .017 18/ .86/ <.001 18/ .40/ .016
PH 80.4-2.9(RPH) 8.55+3(RPH) 84-5.5(RPH)
n/R2/p 18/.59/.001 18/ .92/ <.001 18/  .39/ .03
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of nitrogen (N), phosphorus (P) and potassium (K) in leaves of forbs; Equiseteum arvense (EQAR), Equiseteum fluviatile (EQFL), and Epilobium angustifolium (EPAN). 

Species N(%) P(%) K(%)
EQAR      
JD 17.5-.11(JD)+1.8E-4(JD2) 3.5-2.6E-2(JD)+4.9E-5(JD2) -1.8+7.8E-2(JD)-2.7E-4(JD2)
n/R2/p 66/ .62/ <.001 58/ .72/ <.001 58/ .73/ <.001
GDD 5.7-5.8E-3(GDD)+1.9E-6(GDD2) .82-1.1E-3(GDD)+4E-7(GDD2) 3.6+7.4E-4(GDD)-2E-6(GDD2)
n/R2/p 56/ .84/ <.001 58/ .90/ <.001 58/ .80/ <.001
PH 2.3+.9(PH)-9.7E-3(PH2) .56+5.9E-2(PH)-1E-2(PH2) 1.5+1.1(PH)-.11(PH2)
n/R2/p 54/ .62/ <.001 50/ .68/<.001 50/ .63/ >.001
EQFL      
JD .86+5.6E-2(JD)-2.3E-4(JD2) 3.07-.02(JD)+3.2E-5(JD2) -4.48+.11(JD)-3.5E-4(JD2)
n/R2/p 34/ .53/ .007 34/ .77/ <.001 34/ .85/ <.001
GDD 4.87-3.2E-3(GDD)+3.7E-7(GDD2) .82-1E-3(GDD)+3.6E-7(GDD2) 3.96-6.5E-4(GDD)-1E-6(GDD2)
n/R2/p 34/ .70/ .001 34/ .88/ <.001 34/ .85/ <.001
PH -7.763.6(PH)-.27(PH2) -93+.49(PH)-.04(PH2) *
n/R2/p 24/ .49/ .03 24/ .69/ .005 **24/  3.2/ .18
EPAN      
JD 31.87-.25(JD)+4.99E-4(JD2) 4.12-3.2E-2(JD)+6.4E-5(JD2) 3.3-1.1E-2(JD)
n/R2/p 41/ .76/ <.001 41/ .77/ <.001 41/ .41/ <.001
GDD 5.49-6.6E-3(GDD)+2E-6(GDD2) .61-6.8E-4(GDD)+2.06E-7(GDD2) 1.84-9.6E-4(GDD)
n/R2/p 41/ .81/ <.001 41/ .74/ <.001 41/ .61/ <.001
PH 4.51-.68(PH)+3.14E-2(PH2) .53-.08(PH)+3.4E-3(PH2) 1.5-9.6E-2(PH)
n/R2/p 34/ .68/ <.001 34/ .79/<.001 34/ .61/ <.001
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of  neutral detergent fiber (NDF), acid detergent fiber (ADF) and in-vitro true dry matter digestibility (IVTDMD) in leaves of forbs; Equiseteum arvense (EQAR), Equiseteum fluviatile (EQFL), and Epilobium angustifolium (EPAN). 

Species NDF(%) ADF(%) IVTDMD(%)
EQAR      
JD 133.7-1.1(JD)+3E-3(JD2) 95.9-.85(JD)+2.3E-3(JD2) 14.3+.88(JD)-2.6E-3(JD2)
n/R2/p 65/ .62/ <.001 65/ .73/ <.001 67/ .65 <.001
GDD 32.5-1.8E-2(GDD)+1.7E-5(GDD2) 18.7-1.4E-2(GDD)+1.4E-5(GDD2) 83.67+1.8E-2(GDD)-2.1E-5(GDD2)
n/R2/p 55/ .58/ <.001 55/ .71/ <.001 57/ .66. <.001
PH 41.3-6.3(PH)+.57(PH2) 25.2-4.8(PH)+.4(PH2) 70.4+8.7(PH)-.82(PH2)
n/R2/p 53/ .48/<.001 53/ .59/ <.001 53/ .57/ <.001
EQFL      
JD -226.1+2.5(JD)-5.9E-3(JD2) -71.46+.83(JD)-1.9E-3(JD2) -25.36+1.28(JD)-3.5E-3(JD2)
n/R2/p 31/ .58/ .02 31/ .75/ <.001 31/ .78/ <.001
GDD 15.46+5.3E-2(GDD)-3.1E-5(GDD2) 10.9+2.1E-2(GDD)-1.1E-5(GDD2) 89.53+1.3E-2(GDD)-1.6E-5(GDD2)
n/R2/p 33/ .66/ .01 31/ .83/ <.001 31/ .72/ <.001
PH 117-26.85(PH)+1.97(PH2) 47.73-9.9(PH)+.77(PH2) *
n/R2/p 23/ .70/ <.001 23/ .77/ <.001 **23/ 91.3/ .6
EPAN      
JD -47.05+.34(JD) -34.48+.25(JD) 174.94-.53(JD)
n/R2/p 41/ .66/ <.001 41/ .64/ <.001 41/ .43/ <.001
GDD 6.25+.02(GDD) 4.23+1.5E-2(GDD) 93.11-3.6E-2(GDD)
n/R2/p 41/ .69/ <.001 41/ .63/ <.001 41/ .49/ <.001
PH 9.02+2.69(PH) 5.87+1.99(PH) 88.95-5.14(PH)
n/R2/p 34/ .54/ <.001 34/ .54/ <.001 34/ .51/ <.001
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of nitrogen (N), phosphorus (P) and potassium (K) in leaves of forbs; Pedicularis species (PESP), Hippuris vulgaris (HIVU), and Caltha palustris (CAPA). * Regression equation not significant or available. ** Data presented as n/ x̄ / s.   

 
Species		 N(%) P(%) K(%)
PESP      
JD 4.96-1.28E-2(JD) * *
n/R2/p 19/ .27/ .04    
GDD 3.24-1.4E-3(GDD)    
n/R2/p 19/ .43/ .008    
PH *    
n/R2/p **19/ 2.46/ .08    
HIVU      
JD 2.92-4.3E-3(JD) .49-9.5E-4(JD) 2.54-5.4E-3(JD)
n/R2/p 43/ .14/ .06 43/ .20/ .005 41/ .22/ .004
GDD 2.4-5E-4(GDD) .37-9.6E-5(GDD) 1.78-4.3E-4(GDD)
n/R2/p 43/ .21/ .02 43/ .23/ .003 41/ .19/ .01
PH * .38-2.9E-2(PH) 1.73-7.7E-2(PH)
n/R2/p **43/ 2.2/ p = 0.11 43/ .29/ .001 41/ .10/ .08
CAPA      
JD 5.56-1.5E-2(JD) 2.1-1.43E-2(JD)+2.4E-5(JD2) 6.05-1.6E-2(JD)
n/R2/p 20/.32/ .01 23/ .58/ <.001 23/ .41/ .004
GDD 3.49-1.3E-3(GDD) .71-9.7E-4(GDD)+4.27E-7(GDD2) 3.53-8.4E-4(GDD)
n/R2/p 20/ .54/ <.001 23/ .81/ <.001 23/ .28/ .02
PH 3.75-.15(PH) * *
n/R2/p 20/ .31/ .014 **23/ .33/ .026 **23/ 3.06/ .098
 
 

Relationships between Julian Date (JD), Growing-Degree-Days (GDD) and phenology (PH) and percentage (%) of  neutral detergent fiber (NDF), acid detergent fiber (ADF) and in-vitro true dry matter digestibility (IVTDMD) in leaves of forbs; Pedicularis species (PESP), Hippuris vulgaris (HIVU), and Caltha palustris (CAPA). * Regression equation not significant or available. ** Data presented as n / x̄ / s.   

Species NDF(%) ADF(%) IVTDMD(%)
PESP      
JD -31.73+.33(JD) -22.69+.22(JD) 154.31-.4(JD)
n/R2/p 19/ .83/ <.001 19/ .85/ <.001 19/ .73/ <.001
GDD 14.56+.31E-2(GDD) 9.12+2.1E-2(GDD) *
n/R2/p 19/ 0.80/ < 0.001 19/ 0.80/ < 0.001 **19/ 78.0/ 1.5
PH * * *
n/R2/p **19/ 29.5/ 1.4 **19/ 19.17/ 0.96  
HIVU      
JD 19.66+6.5E-2(JD) * *
n/R2/p 43/ 0.18/ 0.02 **43/ 23.7/ 0.5 **43/ 81.94/ 0.9
GDD 28.61+5.6E-3(GDD) 21.74+3E-3(GDD) *
n/R2/p 43/ 0.19/  0.01 43/ 0.11/  0.07  
PH 25.47+2.48(PH) * *
n/R2/p 43/ 0.12/ 0.06    
CAPA      
JD 202.45-1.93(JD)+5.1E-3(JD2) 111.56-1.04(JD)+2.7E-3(JD2) 117.65-.17(JD)
n/R2/p 23/ 0.32/ 0.05 23/ 0.43/ 0 .01 23/ 0.35/  0.008
GDD * * 94.28-1.4E-2(GDD)
n/R2/p **23/ 20.57/ 0.92 **23/13.08/ 0.43 23/ 0.43/  0.003
PH * * 77.54+5.4(JD)-.57(JD2)
n/R2/p     23/ 0.50/ 0.005